pair	treatment	control
	x1	x2
1	68	60
2	90	76
3	85	94
4	76	53
5	92	69
6	81	81
7	75	84
8	78	70
9	53	50
10	23	20
11	76	62
12	86	72
13	51	65
14	54	58
15	95	68
